Filter Preview Template Path
Change the page template used to render the live preview.
Code
Filename: gplp-filter-preview-template-path.php
<?php
/**
* Gravity Perks // Live Preview // Filter Preview Template Path
* https://gravitywiz.com/documentation/gravity-forms-live-preview/
*
* Change the page template used to render the live preview.
*/
add_filter( 'gplp_preview_template', function( $template ) {
return get_stylesheet_directory() . '/custom-template.php';
} );